It is important to be able to recognize galvanic corrosion. In the following list of cases, explain whether galvanic corrosion is a probable cause of the corrosion.
a. Steel rivets in aluminum drain gutters leak after 2 years of service.
b. Aluminum drain plug in a steel automotive oil pan leaks one month after installation.
c. Testing of unconnected aluminum, copper, and steel specimens exposed in a laboratory reactor shows accelerated corrosion of aluminum.
d. Graphite fiber reinforced aluminum composite specimens show delamination of the fiber after exposure to a salt spray test.
e. Carbon steel pipe leaks near the weld to stainless steel pipe of nearly the same diameter.